Portable drill.



No. 790,268 PATENTED MAY 23, 1905.

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PORTABLEv DRILL. APPLICATION FILED SEPT. s, 1904.

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' No. 790,268.. PATENTED MAY 23,1905

P. R; ANTON.

PORTABLE DRILL.

APPLIUATION FILED SEPT. 6. 1904.

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Patented. May 2?, 1905.

PATENT OFFICE.

PAUL R. ANTON, OF TOPEKA, KANSAS.

PORTABLE DRILL.

SPECIFICATION forming part of Letters Patent No. 790,268, dated May 23,1905.

I Application filed September 6, 1904. Serial No. 223.370.

To aZZ w/wm it Weary concern.-

Be it known that I, PAUL R. ANTON, a citizen of the United States ofAmerica, residing ,in the city of Topeka, in the county of Shaw nee andState of Kansas, have invented new and useful Improvements in PortableDrills, of which the following is a specification.

The invention has reference to the adjustable frame for securing thedrill to variations in the shape of the work, also to the means forsecuring the drill-bitto the spindle or chuck, to the automatic feedingmechanism, and to the gearing attachment, making the drilling quick andeas Aportable drill of the kind herein described is especially adaptedfor drilling holes in iron columns and I-beams embedded in place in thebuilding for the purpose of attaching awnings thereto, although its useis not restricted to that purpose only.

Objects of the invention are to improve generally upon drills of thisnature; to provide an adjustable frame for securing the drill to columnsand I-beams embedded in place in the completed building, especiallyadapted for use in attaching awnings, awnmgfixtures, lamps, signs,brackets, and the like thereto; to overcome the tendency of thedrill-bit to bite through the thin portion at the finishing of the hole;to provide an especially eflicient automatic feeding device, and toprovide a portable drill adapted to the class of work mentionedwhich islight, strong, and durable, simple and efficient in construction andoperation, and readily adjusted and applied to and removed from any suchwork; and my invention consists of the novel parts, improvements, andcombinations, the preferred form of the embodiment whereof ishereindescribed and claimed, and shown in the accompanying drawings,forming part of this specification, and in which- Figure 1 is anelevation view of the drill, assuming it to be applied to a verticalcolumn, the driving-gear and its shaft being removed. Fig. 2 is a topview thereof com- Fig. 3 is a vertical central sectional view throughthe line 3 3 of Figs 1, 2, and 4. Fig. 4 is a sectional view through theline 4 4 of Figs, 2 and 3. In Figs. 1 and 2 is shown in dotted outlinesa means for operating the feed-cylinder by hand, the full outlines inall the figures showing the drill equipped with the automatic feedingdevice.

Like letters of reference indicate like or corresponding partsthroughout the several views. d

On the gas-pipe A, which forms the mainframe rod, are adjustably securedby setscrews 1) I) the sleeves B B, which are provided with sockets inwhich are adjustably secured by set-screws c c the clamping-arms C 0,through the outer ends of which are the pointed set-screws 0 a,respectively. Also on the gas-pipe A, between the two adjustable sleevesB B, is adjustably secured, by means of the set-screw d, the drill-boxD. Screwed into a part of the drill-box is the brace-rod E, having anopening 0 to permit the extension therethrough of the gear-shaft R,hereinafter to be described, and at its lower end an opening 6, in whichmay be adjustably secured the rod F by means of the set-screwf. Thedrill-box has an internally-threaded portion G, into which is screwedthe correspondingly externally threaded feed-cylinder H, within which isrotatably held the drill spindle or chuck I, in which is secured thetwist-drill J by means of the countersunk set-screw 'i. The feedcylinder has an enlarged head h, and an oil-hole h ermits lubricationofthe drill-chuck. The ceding may be eifected by hand or automatically. Ifby hand, then, as indicated by the dotted outlines in Figs. 1 and 2, thecrankKmaybe secured to the Outer end of the chuck or spindleI by meansof the countersunk set-screwi (similar to the set-screw i) dle, andspokes in the manner just described.

The head h has a series of notches h h, so as to form a ratchet. Thepinion L is keyed by the countersunk set-screw 'L to the outer end ofthe drill chuck or spindleI. .Secured to the inner side thereof byscrews m m is an arm M, to the outer end of which is pivoted the pawl ordog N by means of the countersunk pivot-screw n. The engaging end of thepawl is kept in natural tendency to engage the notched head by thespring O, which is fixed in a slotted lug 0 on the pawl and which bearsagainst the pin m, projecting from the rearward extension m of the armM. The collar U, having a peripheral depression at mounted on theunthreaded portion of the feed-cylinder and adjacent to the head h, isof slightly larger diameter than the head. It is held against rotationwith the cylinder by the rod V, reciproeatingly extended through theportion 12 of the drillbox, so as to permit its backward and forwardmovement without partaking of the rotary motion of the cylinder. Thepawl N is Wide enough to engage both the head h and the collar U, fromwhich it may be understood that the pawl will engage the notches 71/only when passing along the depression u. As shown in the drawings, thepawl will be uided by the collar U and will move the feed-cylinder headone notch each revolution. It is to be understood, however, that byincreasing the length of the depression 11. the cylinder may be movedmore than one notch at each revolution, thereby increasing the speed ofthe feeding as may be desired.

To drive the pinion, I provide an internally-geared drive-wheel P, towhich is fastened the crank p, provided with the handle 1). Thedrive-gear is mounted on the shaft R, which is secured in a part of thedrill-box D by set-screw d and which may be extended for additionalrigidity and to prevent the unscrewing of the brace-rod E through theopening e of said brace-rod E. The hub S of the drive-gear has a hollowportion in which, between the shoulder 8, formed thereby, and the head 1of the shaft R, is the compression-spring T, which serves to keep thedrive-wheel in close engagement with the pinion L'as the latter is movedback and forth by the operation of the feeding mechanism. It will befound, however, in actual practice that the necessity for this spring isnot great, as there is nothing tending to disengage the gear from thepinion, and the operator naturally will bear the drive-gear against thepinion.

The operation is as follows: To apply the drill to the work, if it be,for instance, a vertical column the sleeves B B should be first adjustedto the approximate width of the column and there set by set-screws b b,so that the clamping-arms C C will approximately embrace the sides ofthe column. The arms C C may be lengthened or shortened and secured byset-screws 0 c. The pointed setscrews cc are then screwed down tightlyinto depresslons made with a center-punch, I so that the points engagethe sldes of the column firmly to hold the frame and drill to the work.The rod F engages the face of the column and may be nicely adjusted toset the drill at exactly right angles to the work or at any other anglewhich may be desired and prevents the frame from oscillating or turningon the pivots formed by the pointed setscrews cc. The drill-box may beadjusted to any point on the gas-pipe A by means of the set-screw d. Thedrilling is accomplished by applying the hand to either one of thehandles, as above described, and in case of handfeed the feeding may beaccomplished by turning the feed-cylinder by the other hand, as the casemay be. here the contour of the column in cross-section is such that thearms C C, as shown in the drawings, are not long enough, obviouslylonger arms may be provided.

In case the drill is to be used on an I-beam or like structure then thepointed set-serens c 0 may be turned around and pointed outwardly,asindicated in dotted outlines in Fig. 2, either by turning the arms C Chalf-way around or by taking out the pointed setscrews 0 c and screwingthem in the other way, and in this way they may be adjusted and screwedinto the inner face of the flanges of the beam, while the rod F may restagainst the web, thus holding the drill firmly in place while drillinginto the beam.

It will be clear that the driving-gear above described may be used in.connection with the pinion and without the automatic feed if desired,and also that the feeding-pawls might be pivoted directly onto thecrank-arm if a more rapid feed should be desired.

Although the foregoing illustrates and describes the preferred form ofthe invention, it will be understood that I do not intend to limitmyself unduly to the exact description herein or in the drawings andthat l eontemplate changes in form, proportions, and size and thesubstitution of equivalent members, so as to adapt the machine to allcir cumstances within the spirit of the in vention.

What I claim is The combination with the main-frame rod and the drilloperatively mounted thereon; of the two clamping-arms adjnstablysr-scnred to the main rod on opposite sides of the drill; the pointedset-screws on the clamping-arms to engage opposite facesrespeetively ofthe work; and the adjustable brace-rod to engage the front face of thework; substantially as set forth.

In testimony whereof I have hereunto set my handin the presence ofwitnesses.

PAUL R. ANTON.

WVitnesses:

JOSEPH GROLL, Z. T. Frsmm.

